63213563 has 4 divisors (see below), whose sum is σ = 72244080. Its totient is φ = 54183048.

The previous prime is 63213559. The next prime is 63213593. The reversal of 63213563 is 36531236.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63213563 - 2² = 63213559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63213503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4515248 + ... + 4515261.

It is an arithmetic number, because the mean of its divisors is an integer number (18061020).

Almost surely, 2^63213563 is an apocalyptic number.

63213563 is a deficient number, since it is larger than the sum of its proper divisors (9030517).

63213563 is an equidigital number, since it uses as much as digits as its factorization.

63213563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9030516.

The product of its digits is 9720, while the sum is 29.

The square root of 63213563 is about 7950.6957557185. The cubic root of 63213563 is about 398.3548324190.

Adding to 63213563 its reverse (36531236), we get a palindrome (99744799).

The spelling of 63213563 in words is "sixty-three million, two hundred thirteen thousand, five hundred sixty-three".